I've been going through my cooling system. Rebuilt raw water pump, had heat exchanger serviced, fresh water pump inspected and reassembled, new hoses, new expansion tank.

Since I had good access to the distributor, I decided to change points, condenser, rotor and cap. I did not adjust the timing. I simply matched the existing points gap. I also had a new coil in waiting and decided to change that as well. I now have no spark. One possible factor, during the disassembly, I failed to shut off the main switch and shorted something while removing the alternator. I'm not aware of any fuses that I should be checking (unless in line at the battery bank, will check next visit). Any thoughts?

Purging. If the system is cold just remove the fill cap on the HX and start the engine. You can see the level, air will escape and you can add coolant as needed. Do not open this cap with the system hot.
No spark. If "I failed to shut off the main switch and shorted something while removing the alternator." means that you left the coil energized without the engine running you may have fried the coil.
Dan S/V Marian Claire